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首页> 外文期刊>Computational thermal sciences >EFFECTS OF FLAME STRUCTURE ON ENTRAINMENT CHARACTERISTICS OF A FIRE PLUME
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EFFECTS OF FLAME STRUCTURE ON ENTRAINMENT CHARACTERISTICS OF A FIRE PLUME

机译：火焰结构对火羽夹气特性的影响

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摘要

Large-eddy simulations of a fire plume with flames and a buoyant plume without flames were performed. The effects of the flame structure on the entrainment characteristics in the flame region of a plume were then examined through comparison between the two sets of numerical results. The effects of the flame structure on the plume characteristics were marked only in the continuous flame and the intermittent flame regions in the fire plume. The existence of flames increased the mean value of the entrainment coefficient, which corresponds to entrainment efficiency, and the probability density of a high entrainment coefficient. In particular, a feature of a fire plume that prevents the forming of a wide high- temperature area immediately above the fire source was suggested to increase the frequency of highly entraining motion.
机译：进行了带有火焰的火羽和没有火焰的浮羽的大涡模拟。然后，通过比较两组数值结果，研究了火焰结构对烟羽火焰区域内夹带特性的影响。火焰结构对烟羽特性的影响仅在火羽中的连续火焰和间歇火焰区域中明显。火焰的存在增加了夹带系数的平均值，这对应于夹带效率，并且增大了夹带系数的概率密度。尤其是，提出了防止在火源正上方形成较宽的高温区域的火羽特征，以增加高度夹带运动的频率。

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